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This page describes the JavaScript Debugger as it appears before Firefox 52.

See what it looks like from Firefox 52 onwards.

Command Windows OS X Linux
Open the Debugger Ctrl + Shift + S Cmd + Opt + S Ctrl + Shift + S
Search in the current source using the script filter Ctrl + F Cmd + F Ctrl + F
Find next in the current source Enter / Up arrow Return / Up arrow Enter / Up arrow
Find previous in the current source Shift + Enter / Down arrow Shift + Return / Down arrow Shift + Enter / Down arrow
Search in all sources using the script filter Ctrl + Alt + F Cmd + Opt + F Ctrl + Alt + F
Search for scripts by name Ctrl + P / Ctrl + O Cmd + P / Ctrl + O Ctrl + P / Ctrl + O
Search for function definitions Ctrl + D Cmd + D Ctrl + D
Filter variables when execution is paused Ctrl + Alt + V Cmd + Opt + V Ctrl + Alt + V
Resume execution when at a breakpoint F8 F8 1 F8
Step over F10 F10 1 F10
Step into F11 F11 1 F11
Step out Shift + F11 Shift + F11 1 Shift + F11
Toggle breakpoint on the currently selected line Ctrl + B Cmd + B Ctrl + B
Toggle conditional breakpoint on the currently selected line Ctrl + Shift + B Cmd + Shift + B Ctrl + Shift + B
Add selected text to Watch expressions Ctrl + Shift + E Cmd + Shift + E Ctrl + Shift + E
Go to line using the script filter Ctrl + L Cmd + L Ctrl + L
Search using the script filter Ctrl + O Cmd + O Ctrl + O
In the source pane, jump to a function definition (new in Firefox 44) Ctrl + click Cmd + click Ctrl + click

1. By default, on some Macs, the function key is remapped to use a special feature: for example, to change the screen brightness or the volume. See this guide to using these keys as standard function keys. To use a remapped key as a standard function key, hold the Function key down as well (so to open the Profiler, use Shift + Function + F5).

Global shortcuts

These shortcuts work in all tools that are hosted in the toolbox.

Command Windows OS X Linux
Increase font size Ctrl + + Cmd + + Ctrl + +
Decrease font size Ctrl + - Cmd + - Ctrl + -
Reset font size Ctrl + 0 Cmd + 0 Ctrl + 0

Document Tags and Contributors

Contributors to this page: wbamberg
Last updated by: wbamberg,